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Journal of co.l Science & Engineering(China) 2012年第4期18卷 355-361页

作者： WU Cai-fang CHEN Zhao-ying WANG co.g JIANG Wei School of Resources and Geoscience China University of Mining&TechnologyXuzhou 221116China Key Laboratory of CBM and Dynamic Accumulation Process Ministry of Education of ChinaXuzhou 221008China qinshui lanyan coalbed methane co. Ltd.Jingcheng 048006China

The enriched characters of methane co.tent in the main co.l seam of Yunnan＇s Laochang co.l mine was analyzed through co.bined with the geologic co.ditions of the research area： structure type, hydrogeology co.dition, co.l reservoir＇s macerals, ash, water co.tent, and so on. The geology factors of co.trolling gas in Laochang co.l mine were illustrated; and the different geology models of co.trolling gas of geologic co.dition co.pling were posed. Research shows that, in the region, the methane co.tents of the main co.l seams decrease gradually from middle to all around it; the northeast and southeast is higher than the west. In the local area, the methane co.tent of anticline axis is higher, and the gas co.tent is reduced to both wings and plunging crown. On macrosco.ic view, the distribution of methane co.tent in co.l-beds was co.trolled by structural type. On microsco.ic view, the methane co.tent in co.l-beds is mainly involved in co.l reservoir＇s macerals, ash co.tent, and water co.tent. The enriched characters of CBM in the research area are mainly the result of structure-hydrogeology-petrophysics co.pling co.trols of CBM. On the basis of above analysis, acco.ding to the distribution character of methane co.tent in coalbeds, the research area was divided into low gas area, middle gas area, and high gas area.

关键词： coalbed methane enrichment characteristics co.rolling factor Laochang area gas co.tent geological co.dition

High-strength and self-degradable sodium alginate/polyacrylamide preformed particle gels for co.formance co.trol to enhance oil reco.ery

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Petroleum Science 2022年第6期19卷 3149-3158页

作者： Xiao Zhang Jia-Nan Deng Kai Yang Qian Li Sen-Yao Meng Xiu-Xia Sun Zhao-Zheng Song Yong-Dong Tian Sui-An Zhang Xin-Jia Liu Zhan-Yi Wang Xin-Yu Liu Gui-Wu Lu Zi-Long Liu coalbed methane Research Center Beijing Key Laboratory of Optical Detection Technology for Oil and GasCollege of ScienceChina University of Petroleum-BeijingBeijing102249China Shanxi lanyan coalbed methane Group co. LtdJinchengShanxi048012China State Key Laboratory of co.l and CBM co.Mining in Nancun Town JinchengShanxi048012China Institute of Oil and Gas Technology Research Changqing OilfieldCNPCXi’anShaanxi710021China

Excess water production has beco.e an important issue in the oil and gas extraction *** particle gels(PPGs),show the capability to co.trol the co.formance and reduce excess water ***,co.ventional PPGs have poor mechanical properties and their swollen particles are easily damaged by shearing force when passing through the fractures in formations,meanwhile PPGs can be also degraded into various byproducts,leading to permanent damage to the reservoir permeability after temporary ***,a novel type of dual cross-linked PPGs(dPPGs)was designed and synthesized using sodium alginate(SA)and acrylamide(AAm),cross-linked with N,N’-methylenebisacrylamide(MBA)and Fe^(3+).Results show that dPPGs have excellent mechanical properties with a storage modulus up to 86,445 Pa,which is almost 20 times higher than other reported ***,dPPGs can be co.pletely degraded into liquid without any solid residues or byproducts and the visco.ity of dPPGs degraded liquid was found to be lower than 5 mPa·s.A laboratory co.eflooding test showed that the plugging efficiency of dPPGs was up to 99.83%on open *** obtained results demonstrated that dPPGs co.ld be used as eco.omical and environment-friendly temporary plugging agent with high-strength,self-degradation,thermal stability,and salt stability,thus making it applicable to a wide range of co.formance co.trol to enhance oil reco.ery.

关键词： co.formance co.trol Sodium alginate Dual cross-linked Temporary plugging agent High-strength Self-degradation

Study onGeothermal Negative Anomaly andlts Main co.trolling Factors in Sijiazhuang Minefield

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山西焦煤科技 2017年第8期41卷 8-16页

作者： YANG Changyong TIAN Qingling HAO Chunsheng JI Changjiang YU Zhenfeng CHANG Huizhen State Key Laboratory of co.l and CBM co.mining Jin ch en g 048000 China Yi'an lanyan co.l and coalbed methane co.mining Technology co. LTD Taiyuan 030000 China

The research on geothermal field is one of the hot research co.tent in the development of oil or gas and mining *** on the stratum temperature measurement data of 332 borehole in Sijiazhuang co.lfield, the formation lithology and co.posed characteristics, geological and hydrogeological co.ditions, we did a research on the geothermal negative anomaly and its main co.trolling *** the research, we co.e to a co.clusion:The mod-ern geothermal field of Sijiazhuang co.lfield is mainly effected by 3 factors: formation thermal co.ductivity, under-ground water and open *** high co.tent of sandstone in co.lfield layer causes strong thermal co.ductivity, fast heat co.duction, difficulty in heat aggregation, which is the main co.trolling factors of low value in geothermy of Sijiazhuang co.lfield;the strong regional groundwater runoff state is the macro co.trol factors of its lower in modern geothermal field of this *** mine groundwater flow state play a"co.ling" rool and the induced structural chan-nel loss function to the surrounding rock temperature, which is an important co.trol factor of geothermal negative a-nomaly and geothermal field varies in the study area;the open extensional fault and co.lapse co.umn not only provide a good channel for geothermal loss, but also provide favorable co.ditions for the refrigeration to the surrounding rock from aquifer groundwater circulation and runoff ,which is the key co.trol factor to the geothermal negative anomaly and geothermal field varies of this co.l field.

关键词： Sijiazhuang Minefield Geothermal field Geothermal Negative anomaly Geothermal field differen-tiation Main co.trol factors

Enhanced co.ing resistance of a Ni cermet anode by a chromates protective layer

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Journal of Energy Chemistry 2019年第10期28卷 117-125页

作者： Hong Chang Huili Chen Guangming Yang Wei Zhou Jianping Bai Sidian Li Zongping Shao Institute of Molecular Science Key Laboratory Material Energy Conversion & Storage Shanxi ProvinceShanxi UniversityTaiyuan 030006ShanxiChina State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemistry & Chemical EngineeringNanjing University of TechnologyNo.5 Xin Mofan RoadNanjing 210009JiangsuChina Department of Chemical Engineering Curtin UniversityPerthWA 6845Australia State Key Laboratory of co.l and CBM co.Ming Shanxi Lanyan Coalbed Methane Group Co. LtdJincheng 048204ShanxiChina

Ni-based anodes of SOFCs are susceptible to co.ing, which greatly limits practical application of direct methane-based fuels. An indirect internal reformer is an effective way to co.vert methane-based fuels into syngas before they reach anode. In this work, catalytic activity of a redox-stable perovskite La0.7Sr0.3Cr0.8Fe0.2O3-δ(LSCrFO) for methane co.version was evaluated. The catalyst was fabricated as an anodic protective layer to improve co.ing resistance of a Ni cermet anode. Using wet CH4 as a fuel, the LSCrFO-modified cell showed excellent power output and good co.ing resistance with peak power density of 1.59 W cm-2 at 800℃. The cell demonstrated good durability lasting for at least 100 h. While the bare cell without the protective layer showed poor durability with the cell voltage fast dropped from 0.75 V to 0.4 V within 30 min. Under wet co.l bed methane (CBM) operation, obvious performance degradation within 35 h (1.7 mV h^-1) was observed due to the influence of heavy carbon co.pounds in CBM. The pre-and post-mortem microstructures and carbon analysis of the anode surface and catalyst surface were further co.ducted.

关键词： Solid oxide fuel cell (SOFC) Ni cermet anode methane-based fuels Chromates catalyst co.ing resistance

寺家庄井田地温负异常及其主控因素研究（英文）

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山西焦煤科技 2017年第Z1期 8-16页

作者：杨昌永田庆玲郝春生季长江于振锋常会珍 State Key Laboratory of co.l and CBM co.mining Yi'an lanyan co.l and coalbed methane co.mining Technology co. LTD

The research on geothermal field is one of the hot research co.tent in the development of oil or gas and mining *** on the stratum temperature measurement data of 332 borehole in Sijiazhuang co.lfield,the formation lithology and co.posed characteristics,geological and hydrogeological co.ditions,we did a research on the geothermal negative anomaly and its main co.trolling *** the research,we co.e to a co.clusion:The modern geothermal field of Sijiazhuang co.lfield is mainly effected by 3 factors:formation thermal co.ductivity,underground water and open *** high co.tent of sandstone in co.lfield layer causes strong thermal co.ductivity,fast heat co.duction,difficulty in heat aggregation,which is the main co.trolling factors of low value in geothermy of Sijiazhuang co.lfield;the strong regional groundwater runoff state is the macro co.trol factors of its lower in modern geothermal field of this *** mine groundwater flow state play a"co.ling"rool and the induced structural channel loss function to the surrounding rock temperature,which is an important co.trol factor of geothermal negative anomaly and geothermal field varies in the study area;the open extensional fault and co.lapse co.umn not only provide a good channel for geothermal loss,but also provide favorable co.ditions for the refrigeration to the surrounding rock from aquifer groundwater circulation and runoff,which is the key co.trol factor to the geothermal negative anomaly and geothermal field varies of this co.l field.

关键词： Sijiazhuang Minefield Geothermal field Geothermal Negative anomaly Geothermal field differentiation Main co.trol factors

Geological co.trols on the CBM Productivity of No.15 co.l Seam of Carboniferous–Permian Taiyuan Formation in Southern qinshui Basin and Prediction for CBM High-yield Potential Regions

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Acta Geologica Sinica(English Edition) 2018年第6期92卷 2310-2332页

作者： ZHANG Zheng QIN Yong ZHUANG Xinguo LI Guoqing LIU Donghai Key Laboratory of Tectonics and Petroleum Resources China University of GeosciencesMinistry of Education Faculty of Earth Resources China University of Geosciences State Key Laboratory of Water Resource Protection and Utilization in co.l Mining Key Laboratory of coalbed methane Resources and Reservoir Formation Process Ministry of EducationChina University of Mining and Technology State Key Laboratory of co.l and CBM co.mining Shanxi Jincheng Anthracite Mining Group Co. Ltd.

coalbed methane(CBM) resources in No.15 co.l seam of Taiyuan Formation acco.nt for 55% of the total CBM resources in southern qinshui Basin(SQB), and have a great production potential. This study aims at investigating the CBM production in No.15 co.l seam and its influence factors. Based on a series of laboratory experiments and latest exploration and development data from local co.l mines and CBM co.panies, the spatial characteristics of gas production of No.15 co.l seam were analyzed and then the influences of seven factors on the gas productivity of this co.l seam were discussed, including co.l thickness, burial depth, gas co.tent, ratio of critical desorption pressure to original co.l reservoir pressure(RCPOP), porosity, permeability, and hydrogeological co.dition. The influences of hydrological co.dition on CBM production were analyzed based on the discussions of four aspects: hydrogeochemistry, roof lithology and its distribution, hydrodynamic field of groundwater, and recharge rate of groundwater. Finally, a three-level analytic hierarchy process(AHP) evaluation model was proposed for predicting the CBM potentials of the No.15 co.l seam in the SQB. The best prospective target area for CBM production of the No.15 co.l seam is predicted to be in the districts of Panzhuang, Chengzhuang and south of Hudi.

关键词： coalbed methane gas productivity co.trolling factors production potential Taiyuan Formation southern qinshui Basin

Simulation of Paleotectonic Stress Fields and Distribution Prediction of Tectonic Fractures at the Hudi co.l Mine, qinshui Basin

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Acta Geologica Sinica(English Edition) 2017年第6期91卷 2007-2023页

作者： FANG Huihuang SANG Shuxun WANG Jilin LIU Shiqi JU Wei Key Laboratory of coalbed methane Resources and Reservoir Formation Process of the Ministry of Education China University of Mining and Technology School of Resources and Geosciences China University of Mining and Technology Low Carbon Energy Institute China University of Mining and Technology The Key Laboratory of co.l-based co. Capture and Geological Storage Jiangsu ProvinceChina University of Mining and Technology

Study on tectonic fractures based on the inversion of tectonic stress fields is an effective method. In this study, a geological model was set up based on geological data from the Hudi co.l Mine, qinshui Basin, a mechanical model was established under the co.dition of rock mechanics and geostress, and the finite element method was used to simulate the paleotectonic stress field. Based on the Griffith and Mohr-co.lomb criterion, the distribution of tectonic fractures in the Shanxi Formation during the Indosinian, Yanshanian, and Himalayan period can be predicted with the index of co.prehensive rupture rate. The results show that the acting force of the Pacific Plate and the India Plate to the North China Plate formed the direction of principal stress is N-S, NW - SE, and NE - SW, respectively, in different periods in the study area. Changes in the direction and strength of the acting force led to the regional gradients of tectonic stress magnitude, which resulted in an asymmetrical distribution state of the stress co.ditions in different periods. It is suggested that the low-stress areas are mainly located in the fault zones and extend along the direction of the fault zones. Furthermore, the high-stress areas are located in the junction of fold belts and the binding site of multiple folds. The development of tectonic fractures was affected by the distribution of stress intensity and the tectonic position of folds and faults, which resulted in some developed areas with level I and II. There are obvious differences in the development of tectonic fractures in the fold and fault zones and the anticline and syncline structure at the same fold zones. The tectonic fractures of the Shanxi Formation during the Himalayan period are more developed than those during the Indosinian and Yanshanian period due to the superposition of the late tectonic movement to the early tectonic movement and the differences in the magnitude and direction of stress intensity.

关键词： tectonic fracture paleotectonic stress field co.prehensive rupture rate numerical simulation Hudi co.l Mine qinshui Basin

Pore structure co.plexity and its significance to the petrophysical properties of co.l measure gas reservoirs in qinshui Basin,China

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Frontiers of Earth Science 2021年第4期15卷 860-875页

作者： Xiaowei HOU Yang WANG Yanming ZHU Jie XIANG School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China coalbed methane Resources and Reservoir Formation Process Key Laboratory of Ministry of Education China University of Mining&TechnologyXuzhou 221008China School of Resources and Geoscience China University of Mining&TechnologyXuzhou 221116China

The pore structure of co.tinuous unco.ven-tional reservoirs(CURs)in co.l measures was investigated using different technologies for 29 samples(9 co.l samples,9 shale samples,and 11 sandstone samples)from qinshui Basin,*** show that co.ls have relatively high porosities and permeabilities ranging from 4.02%to 5.19%and 0.001 to 0.042 mD,***(co.ls and co.tribute to the majority of pore volume(PV)and specific surface area(SSA).The porosities and permeabilities are between 1.19%-4.11%,and 0.0001-0.004 mD of sand-stones with a predominance of macropores(>50 nm).However,shales are characterized by poorly petrophysical properties with low porosity and *** and mesopores(2-50 nm)are well-developed in shales co.pared with *** co.ls,abundant organic matters are expected to promote the development of micropores,and clay minerals significantly co.trol the performance of *** shales and sandstones,micropores are mainly observed in organic matters,whereas clay minerals are the important co.tributor to ***,micropore SSA significantly deter-mines the adsorption capacity of CURs and sandstones have the best pore *** permeability of CURs is positively associated with the macropore PV since macropores serve as the main flow paths for gas ***,we also proposed that effective porosity has a significant effect on the permeability of *** findings of this study co.ld enhance the understanding of the multiscale pore structure of CURs and provide insights into the mechanisms that co.trol gas storage,transport,and subsequent co.production for co.tinuous unco.ventional natural gas(CUNG)in the qinshui Basin and other co.l-bearing basins worldwide.

关键词： co.tinuous unco.ventional reservoirs(CURs) pore structure adsorption capacity permeability effective porosity

co.parison of pore characteristics in the co.l and shale reservoirs of Taiyuan Formation, qinshui Basin, China

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International Journal of co.l Science & Technology 2016年第3期3卷 330-338页

作者： Yu Liu Yanming Zhu Key Laboratory of co.l methane Resource & ReservoirFormation Process of Ministry of Education ChinaUniversity of Mining & Technology Key Laboratory of co.l methane Resource & Reservoir Formation Process of Ministry of Education China University of Mining & TechnologyXuzhou 221008 Jiangsu China

co.l and shale are both unco.ventional gas reservoirs. co.parison of pore characteristics in shale and co.l would help understand organic pore structure in shale and investigate co.exploration of shale gas and coalbed methane in co.l bearing strata. In this study, five shale samples and three co.l samples of Taiyuan Formation were co.lected from qinshui Basin, China. High pressure mercury injection, scanning electronic microsco.y, and fractal theory have been used to co.pare pore characteristics in shale and co.l. The results show that pore volumes in co.l are much larger than that in shale, especially pores 3-100 nm. In co.l, there are many semi-closed pores in micro pores （〈10 nm） and transition pores （10-100 nm）. On the co.trary, micro pores and transition pores are mainly with open pores in shale. The fractal curves show that pores larger than 65 nm in co.l and shale reservoir both have obvious self-similarity and the fractal dimension values in shale and co.l are similar. But the fractal characteristics of pores smaller than 65 nm in shale reservoir are quite different from that in co.l.

关键词： co.parison co.l Shale Organic pores Fractal

Approach to the Design Calculation of Sucker Rod Pumping Systems in coalbed methane Wells

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Chinese Journal of Mechanical Engineering 2011年第6期24卷 983-991页

作者： WANG Fudong LIU Xinfu Guan Zhichuan LIU Chunhua School of Petroleum Electronic Engineering China University of Petroleum Qingdao 266555 China Qingdao TSC Offshore Equipment co Ltd. Qingdao 266108 China

The existing design of the pumping systems mainly focuses on the approximate co.putational formulae and procedures,which are developed based on the analytic approaches of co.ventional oil/gas *** calculation of polished rod loads usually just co.cerns about the static and inertial *** the co.putation of gearbox torque generally uses empirical formulae and co.rection *** above modeling procedures,if applied to the coalbed methane（CBM） wells,can not give the desired accuracy of the system design and its pertinent *** this paper,based on the kinematic and dynamic analysis of the pumping system,the kinematic relation of polished rod is analyzed,and the variation of the total loads of polished rod is developed with the limits of CBM well co.ditions along the *** gearbox torque calculation model is established by co.bining the co.nterbalance effect with the calculated dynamometer cards and torque *** application characteristics of this model are demonstrated by the example of ZH002-4 well in qinshui *** interpretations of results show that the cranks of beam units should rotate in a co.nter clockwise direction viewed with the wellhead to the *** with oil？gas fields,the dynamic and friction to polished rod load ratios are relatively high and the co.putation of polished rod loads should involve the static and inertial loads,as well as vibration and friction *** the dynamic load ratio decreases rapidly during the ***,the total deformation of the string is small in CBM *** for balanced operation,the gearbox torque load usually has two approximately equal peaks and the magnitudes of instantaneous torque are just within 50% of unbalanced gearbox *** proposed research improves efficiency of the pumping system,loads the pumping unit more uniformly,and provides the reasonable basis for selecting the units.

关键词： sucker rod pump kinematic analysis polished rod load dynamometer card gearbox torque